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Bedrock Geology of Pennsylvania"

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Bedrock Geology of Pennsylvania POLYGON ATTRIBUTES FOR "BEDROCK GEOLOGY OF PENNSYLVANIA" UNITNO: A unique number assigned to each map unit in the data sets for geologic units and dikes. The number, which is not derived from the 1980 map, places the units approximately, but not completely, in a sequence ranging from those having the youngest ages (lower numbers) to those having the oldest ages (higher numbers). In the data set for geologic units, there are 193 unique unit numbers ranging from 1 to 195 (unit number 6, kimberlite, and unit number 15, Quarryville Diabase, occur only in the data set for dikes). Units 8 (diabase), 163 (pegmatite), and 183 (metadiabase) occur in both the data set for geologic units and the data set for dikes. MAP_SYMBOL: The symbol used to label the unit on the 1980 state geologic map, except where modified as indicated in "changes.pdf." Please note that the "double-bar P" shown on the 1980 map to indicate units of Pennsylvanian age has been changed to "P," the special character for Triassic units (capital "T" joined to small capital "R") has been changed to "Tr,"and the special character for units of Cambrian age ("C" with horizontal bar) has been changed to "C" in the attribute table. NAME: The name of the geologic unit in the explanation of the 1980 state geologic map (Berg and others, 1980), except where modified as indicated in "changes.pdf." AGE: The age of the geologic unit as shown on the 1980 state geologic map (Berg and others, 1980). Ages are at the level of a geologic period. LITH1: The dominant lithology, volumetrically, in the rock unit. Lithologies were modified from the geologic description in the map explanation of the 1980 state geologic map (Berg and others, 1980), based on reviews by staff geologists of the Pennsylvania Geological Survey in 1998 and 2000. The lithologies are assigned based on the entire areal extent of the geologic unit within Pennsylvania; thus, all lithologies listed (particularly in the LITH3 item) may not be present in local areas. LITH2: The secondmost dominant lithology, volumetrically, in the map unit. See LITH1 above for source. LITH3: Other major lithologies, volumetrically, in the rock unit. See LITH1 above for source. 1 MAP_ UNITNO SYMBOL NAME AGE LITH1 LITH2 LITH3 1 Qs Sands of Presque Isle Quaternary Sand 2 Qt Trenton Gravel Quaternary Gravelly sand Sand Clay-silt; alluvium; swamp deposits 3 Tpb Pensauken and Bridgeton Tertiary Feldspathic quartz Gravel Clay; silt Formations, undifferentiated sand 4 Tbm Bryn Mawr Formation Tertiary Gravelly sand Silt 5 Kp Patapsco(?) Formation Cretaceous Ferruginous clay Sand 7 Js Sedimentary strata at Jurassic Arkosic sandstone Shale Limestone; siltstone; conglomerate Jacksonwald and Aspers 8 Jd Diabase Jurassic Diabase 9 Trg Gettysburg Formation Triassic Silty mudstone Shale Sandstone; limestone 10 Trb Brunswick Formation Triassic Mudstone Siltstone Shale; argillite 11 Trfl Limestone fanglomerate Triassic Limestone conglomerate 12 Trfq Quartz fanglomerate Triassic Quartz conglomerate 13 Trh Hammer Creek Formation Triassic Sandstone Siltstone Mudstone 14 Trgh Heidlersburg Member of Triassic Shale Argillite Arkosic sandstone; quartz Gettysburg Formation conglomerate; limestone conglomerate 16 Trl Lockatong Formation Triassic Argillite Black shale Limestone; calcareous shale 17 Trgc Gettysburg conglomerate Triassic Quartz conglomerate Sandstone Siltstone; mudstone 18 Trhc Hammer Creek conglomerate Triassic Quartz conglomerate Sandstone 19 Trn New Oxford Formation Triassic Arkosic sandstone Shale Mudstone; sandstone 20 Trs Stockton Formation Triassic Arkosic sandstone Siltstone Sandstone; mudstone 21 Trnc New Oxford conglomerate Triassic Quartz conglomerate 22 Trsc Stockton conglomerate Triassic Quartz conglomerate Conglomeratic sandstone 23 Pg Greene Formation Permian Sandstone Shale Limestone; coal 24 Pw Washington Formation Permian Sandstone Shale Limestone; coal 25 PPw Waynesburg Formation Permian and Sandstone Shale Limestone; coal Pennsylvanian 26 Pm Monongahela Group Pennsylvanian Limestone Shale Sandstone; coal 27 Pc Conemaugh Group Pennsylvanian Shale Siltstone Sandstone; limestone; coal 28 Pcc Casselman Formation Pennsylvanian Shale Siltstone Sandstone; limestone; coal 29 Pcg Glenshaw Formation Pennsylvanian Shale Sandstone Limestone; coal 30 Pap Allegheny and Pottsville Pennsylvanian Sandstone Shale Conglomerate; coal Formations, undivided 31 Pa Allegheny Formation Pennsylvanian Sandstone Shale Limestone; clay; coal 2 MAP UNITNO SYMBOL NAME AGE LITH1 LITH2 LITH3 32 Pl Llewellyn Formation Pennsylvanian Sandstone Siltstone Shale; conglomerate; coal 33 Pp Pottsville Formation Pennsylvanian Sandstone Conglomerate Shale; siltstone; claystone; limestone; coal 34 Mmc Mauch Chunk Formation Mississippian Shale Siltstone Sandstone; conglomerate; limestone 35 Mbc Burgoon Sandstone through Mississippian Sandstone Shale Siltstone; conglomerate Cuyahoga Group, undifferentiated 36 Mb Burgoon Sandstone Mississippian Sandstone Conglomerate Shale; coal 37 Mp Pocono Formation Mississippian Sandstone Siltstone Conglomerate 38 Msc Shenango Formation through Mississippian Sandstone Siltstone Shale Cuyahoga Group, undivided 39 Ms Shenango Formation Mississippian Sandstone Shale Siltstone 40 Mc Cuyahoga Group Mississippian Siltstone Shale Sandstone 41 MDpr Pocono and Rockwell Mississippian and Sandstone Conglomerate Shale Formations, undivided Devonian 42 MDsr Shenango Formation through Mississippian and Sandstone Siltstone Shale Riceville Formation, undivided Devonian 43 MDso Shenango Formation through Mississippian and Sandstone Siltstone Shale Oswayo Formation, undivided Devonian 44 MDr Rockwell Formation Mississippian and Argillaceous Shale Carbonaceous shale; Devonian sandstone conglomerate; diamictite 45 MDhm Huntley Mountain Formation Mississippian and Sandstone Siltstone Shale Devonian 46 MDsk Spechty Kopf Formation Mississippian and Sandstone Siltstone Polymictic diamictite; mudstone; Devonian laminite; shale; conglomerate 47 Dbr Berea Sandstone through Devonian Sandstone Siltstone Shale Riceville Formation, undivided 48 Dcr Corry Sandstone through Devonian Sandstone Siltstone Shale Riceville Formation, undivided 49 Dbv Berea Sandstone through Devonian Sandstone Siltstone Shale; conglomerate Venango Formation, undivided 50 Dv Venango Formation Devonian Siltstone Sandstone Shale; conglomerate 51 Dck Catskill Formation Devonian Sandstone Siltstone Shale; conglomerate; mudstone 52 Dcb Buddys Run Member of Catskill Devonian Siltstone Mudstone Sandstone Formation 3 MAP UNITNO SYMBOL NAME AGE LITH1 LITH2 LITH3 53 Dcd Duncannon Member of Catskill Devonian Sandstone Siltstone Mudstone; conglomerate Formation 54 Dch Chadakoin Formation Devonian Siltstone Sandstone Shale 55 Dg Girard Shale Devonian Argillaceous shale Siltstone 56 Dne Northeast Shale Devonian Shale Siltstone 57 Dccf Clarks Ferry Member of Catskill Devonian Sandstone Siltstone Conglomerate Formation 58 Dcsc Sherman Creek Member of Devonian Mudstone Siltstone Sandstone Catskill Formation 59 Dcbs Berry Run and Sawmill Run Devonian Sandstone Siltstone Mudstone Members of Catskill Formation, undivided 60 Dcpp Poplar Gap and Packerton Devonian Sandstone Conglomerate Siltstone Members of Catskill Formation, undivided 61 Dcpg Poplar Gap Member of Catskill Devonian Sandstone Conglomerate Siltstone Formation 62 Dcp Packerton Member of Catskill Devonian Sandstone Conglomerate Siltstone Formation 63 Dclr Long Run Member of Catskill Devonian Sandstone Siltstone Mudstone Formation 64 Df Foreknobs Formation Devonian Sandstone Siltstone Shale; conglomerate 65 Dciv Irish Valley Member of Catskill Devonian Siltstone Mudstone Sandstone Formation 66 Ds Scherr Formation Devonian Siltstone Sandstone Shale; mudstone 67 Dclw Long Run and Walcksville Devonian Sandstone Siltstone Mudstone Members of Catskill Formation, undivided 68 Dlh Lock Haven Formation Devonian Mudstone Siltstone Sandstone; conglomerate 69 Dcbr Beaverdam Run Member of Devonian Siltstone Sandstone Shale Catskill Formation 70 Dcwt Walcksville and Towamensing Devonian Sandstone Siltstone Mudstone; shale Members of Catskill Formation, undivided 71 Dcw Walcksville Member of Catskill Devonian Sandstone Siltstone Mudstone Formation 72 Dct Towamensing Member of Devonian Sandstone Siltstone Shale Catskill Formation 4 MAP UNITNO SYMBOL NAME AGE LITH1 LITH2 LITH3 73 Dbh Brallier and Harrell Formations, Devonian Siltstone Shale Black shale undivided 74 Dtr Trimmers Rock Formation Devonian Siltstone Shale Sandstone; black shale 75 Dh Hamilton Group Devonian Shale Siltstone Black shale; argillaceous limestone; sandstone; limestone; bentonite 76 Dmh Mahantango Formation Devonian Shale Siltstone Argillaceous limestone; sandstone 77 Dm Marcellus Formation Devonian Black shale Limestone Bentonite 78 Doo Onondaga and Old Port Devonian Calcareous shale Sandstone Limestone; argillaceous limestone; Formations, undivided chert; shale; siliceous siltstone; bentonite 79 Don Onondaga Formation Devonian Calcareous shale Argillaceous Bentonite limestone 80 Dbe Buttermilk Falls Limestone Devonian Siliceous sandstone Limestone Siltstone; shale; chert through Esopus Formation, undivided 81 Dor Ridgeley Member of Old Port Devonian Sandstone Formation 82 Drc Ridgeley Formation through Devonian Sandstone Siltstone Shale; limestone; chert Coeymans Formation, undivided 83 Dosn Shriver, Mandata, Corriganville, Devonian Limestone Chert Shale; siliceous siltstone and New Creek Members of Old Port Formation, undivided 84 DSop Onondaga Formation through Devonian and Shale Sandstone Limestone;
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